January 15  Ben Antieau (Northwestern)  Genus 1 curves in twisted projective spaces  video, slides

January 22  Takumi Murayama (Princeton)  Grothendieck’s localization problem  video, slides, handout 
January 29  Soumya Sankar (Ohio State)  Derived equivalences of gerbey curves  
February 5  Sean Keel (UT Austin)  Berkovich geometry and mirror symmetry  video 
February 12  Laure Flapan (Michigan State)  Fano manifolds associated to hyperkähler manifolds  slides 
February 19  Izzet Coskun (UIC)  Algebraic Hyperbolicity and Langtype loci in hypersurfaces  video, slides 
February 26  Jihao Liu (Utah)  Complements and local singularities in birational geometry  video, slides 
March 5  Arend Bayer (Edinburgh)  Fano varieties: from derived categories to geometry via stability  video, slides 
March 12, 4 pm  Yuuji Tanaka (Kyoto)  On the virtual Euler characteristics of the moduli spaces of semistable sheaves on a complex projective surface  slides 
March 26  Nikolas Kuhn (Stanford)  A blowup formula for virtual Donaldson invariants  video 
April 2  Matt Baker (Georgia Tech)  Pastures, Polynomials, and Matroids  video 
April 9  Sam Molcho (ETH)  The strict transform in logarithmic geometry  slides 
April 16  Samir Canning (UC San Diego)  The Chow rings of M_{7,} M_{8}, and M_{9}  video, slides 
April 23  Michael Temkin (HUJI)  Logarithmic resolution of singularities  video, slides 
April 30  Remy van Dobben de Bruyn (Princeton/IAS)  Constructing varieties with prescribed Hodge numbers modulo m in positive characteristic  slides 
May 7  Geoff Smith (UIC)  Normal bundles of rational curves and separably rationally connected varieties  video, slides 
May 14  Joachim Jelisiejew (Warsaw)  Pathologies on the Hilbert scheme of points  video, slides 
May 21  Eric Katz (Ohio State)  Iterated padic integration on semistable curves  video, slides

May 28  Dhruv Ranganathan (Cambridge)  Constructing logarithmic moduli  video, slides 
June 4  Martin Ulirsch (GoetheUniversität Frankfurt)  Tropical geometry and logarithmic compactifications of reductive algebraic groups  video, slides 
June 11  Lena Ji (Princeton/Michigan)  The Noether–Lefschetz theorem  slides 
June 18 – July 2    no meetings 
July 9  Denis Nardin (Regensburg)  Quadratic forms on rings and the homotopy limit problem  video, slides 
July 16  Raymond Cheng (Columbia)  qbic hypersurfaces  video, slides 
July 23  Tom Graber (Caltech)  Virtual localization for relative obstruction theories and stable log maps  video, slides 
July 30  Federico Scavia (UBC)  The Grothendieck ring of stacks
The synchronous discussion for Federico Scavia’s talk is taking place not in zoomchat, but at https://tinyurl.com/20210730fs (and will be deleted after ~37 days).  
August 6  Ritvik Ramkumar (Berkeley)  On the tangent space to the Hilbert scheme of points in P^3
The synchronous discussion for Ritvik Ramkumar’s talk is taking place not in zoomchat, but at https://tinyurl.com/20210806rr (and will be deleted after ~37 days).  
August 13  Elden Elmanto (Harvard)  The completely decomposed arc topology and motivic applications
The synchronous discussion for Elden Elmanto’s talk is taking place not in zoomchat, but at https://tinyurl.com/20210813ee (and will be deleted after ~37 days).  
August 20  Maria Yakerson (ETH)  Twisted Ktheory in motivic homotopy theory
The synchronous discussion for Maria Yakerson’s talk is taking place not in zoomchat, but at https://tinyurl.com/20210820my (and will be deleted after ~37 days).  